Interesting, I was thinking to write a book or create a web-based tool about MTBO and techniques to improve, and agree that there is lack of resources in one place, though there a lot of them out there that require deep digging. If you send me PM to my email gudeso@gmail.com I will send some stuff.

This would be a great resource on the OUSA website. I think that it's an important, and sometimes difficult transition...from navigation using a model of linear features (map, and mental model) to navigation using, well, everything else, including contours.

I found that what helped with this when I started was map-making a thirty acre park (better that than a large forest where one will be tempted to go too quickly and not learn). It's a constant correction of one's mental model of what one sees, based on how things reconcile with compass bearings, pace counts, GPS and other evidence about how things relate. I'd suggest even taking bearings, pace counts, GPS tracks and waypoints on topographic features...along reentrants or ridges, along contours, between knolls, and so forth, as a learning exercise. Again, this is in the context of learning intermediate orienteering skills by improving one's ability to mentally visualize a map of the terrain, and mentally visualize the terrain from the map, not learning map making (though it's a good very early start on that too).

Orienteering Ontario's book from the 1980s, "Orienteering: Skills and Strategies" by Ron Lowry and Ken Sidney, is useful at that stage of learning. It can be downloaded for free now, thanks to the generosity of the authors and publisher.
https://drive.google.com/file/d/1bWUpAguftwtqcptnI...

The patch program doesn't have detailed explanations of how to perform the skills, but it will help with understanding what you should be working on at each level.

I want to put in a plug for the book "Discovering Orienteering" (Ferguson and Turbyfill as mentioned above). Many people don't seem to realize that this is OUSA's Book. We make royalties from the sales. So no, there would not be any plan to port the content of the book online. People should purchase it and OUSA should do more to market it as our primary suggested resource.

Agree with Clare we worked together on the patch program progression. I have the skills progression that we talked about that I give out at coaching clinics. It does not have the exercises to go with it but lays out what a person should know and be able to do at the end of the yellow that will have them properly prepared for the orange level and the same for orange to advanced.

FWIW, here's what I replied to the inquirer (with a few more comments regarding Discovering Orienteering not being in the OUSA site):

Here's what I could find on the OUSA website regarding O skills training. You might find something useful on one or more of those pages.

An exercise not mentioned below but which helped me immensely to make the mental leap was to orienteer on a contours-only map (if you have a suitable, fairly-open-woods map/area to use). Make sure learners understand what the contour lines mean; there are a number of pages online that demonstrate reading topo maps.

Having moved up not so long ago, the books mentioned are great. And there are some excellent videos online, including those from Glenmore Lodge in Scotland, and Rick and Kelsey Breseman. However, the most important aids were the map walks that Jon Torrance and Tom Nolan led us on, after usual meets, to talk though looking at the terrain and comparing it with the map, route choices proposed by various members of the group, and answering questions as they came up. I strongly recommend that clubs provide those kinds of help. At the orange level, there is a big difference between knowing in your head what you should be doing and trying to put it into practice. (Thanks QOC!)

I also found some of the discussions of advanced orienteerings on this blog very helpfujl. It would be nice for someone to tag them as "learning" discussions. For example, there was one on o'ing in rocky terrain that I recall helping.

That Glenmore guy demonstrating the bearing along a track had his compass hanging from his neck. DQed himself as an expert in my eyes right there.
Videos and You Tube are popular with lots of oreinteers. Generally I find them good for entertainment and general information but pretty crappy as a teaching tool as everyone is doomed to learn at the same speed and there is no interaction and it is not easy to stop and review. Most amateur narrators, self included, just don't have the voice projection for the job, too.
Give me a slide show any day.